The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON COMPUTER RESEARCH
Transactions ID Number: 32-213
Full Name: Azami Zaharim
Position: Associate Professor
Age: ON
Sex: Male
Address: 3 Coordinator, Fundamental Engineering Unit,Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor. MALAYSIA
Country: MALAYSIA
Tel: 603-89216843
Tel prefix: 603-89216681
Fax: 603-89216960
E-mail address: azami@vlsi.eng.ukm.my
Other E-mails: azaminelli@gmail.com
Title of the Paper: Application of Equatorial Ionospheric Differential Delay Model to Improve Ambiguity Resolution Success Rate for Precise Positioning
Authors as they appear in the Paper: NORSUZILA YA¡¯ACOB, MARDINA ABDULLAH,MAHAMOD ISMAIL,AND AZAMI ZAHARIM
Email addresses of all the authors: norsuzilayaacob@yahoo.com, mardina@eng.ukm.my,mahamod@eng.ukm.my, azaminelli@gmail.com
Number of paper pages: 10
Abstract: : GPS has become the buzzword in the navigation industries which include automotive, satellite, avionics and marine sectors. It is widely recognized as the most accurate method of navigation in the world. The Earth¡¯s ionosphere plays a crucial role in Global Positioning System (GPS) accuracy because this layer can lead to errors in positioning which may exceed 100 m. However, positioning accuracy can be reached after the removal or mitigation of different error sources. The influence of the ionosphere is one of the main problems in ambiguity resolution for carrier phase. Resolving the initial phase ambiguities of GPS carrier phase observations has always been considered an important aspect of GPS processing techniques. In this study we are reviewing the ambiguity resolution problem under the new aspect of using ionospheric models over equatorial region for single frequency over short baseline distance. The observation data is at Universiti Teknologi Malaysia, Joho!
r (1¢ª 33¡¯ 56.93¡±N, 103¢ª 38¡¯ 22.42¡±E), UTMJ, and Kukup, Johor (1¢ª19¡¯59.791¡±N, 103¢ª27¡¯12.354¡±E), KUKP on 8 November 2005 from Malaysia Department of Survey and mapping, JUPEM was used. From the model, we can get differential ionospheric delay in sub-centimetre accuracy. This can also be used by a single frequency receiver for a short time in short baselines. Findings show improvements in the correction of the differential ionospheric error over short baselines. The ambiguities were resolved when the variance ratio increased and the reference variances decreased.
Keywords: ionosphere, differential GPS, ambiguity, single frequency, equatorial, baseline
EXTENSION of the file: .doc
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